Jannik Sinner, Aryna Sabalenka, Novak Djokovic and more of the 20 highest-ranked players included their handwritten signatures.

Plus, Stefanos Tsitsipas looks to continue his mysterious mastery of Monte Carlo, and more storylines we're following at the historic clay-court event.

Stefano Vukov's return to Elena Rybakina's setup has been proven beyond any reasonable doubt after one of her team members ...